Electron Correlation and Magnetism in Narrow-Band Systems : Proceedings of the Third Taniguchi International Symposium, Mount Fuji, Japan, November 1–5, 1980

Speech by Toyosaburo Taniguchi Welcome my friends to the Third International Symposium, Division on the Theory of Condensed Matter, of the Taniguchi Foundation. The need is now greater than ever for Japan to consider how to strengthen and foster international understanding between nations, peoples and societies, and how to contribute towards the establishment of peace and prosperity in the world. For more than twenty years, I have been supporting a symposium on mathe­ matics in which distinguished scholars from allover the world have engaged in free discussions. In this symposium, all the participants live together in community style. I have heard from members of some of these study groups that this type of setup has helped to strengthen their ties and relationships with their colleagues on a personal basis. What developed in the mathematics group led me to reorganize and strengthen the Taniguchi Foundation only a few years ago through additional funding. In order to effectively translate the objectives of the Foundation into action with the funds available, it becomes necessary to select those fields which are not necessarily in the limelight of popular interest, which means those fields which, I am afraid, are low in funding. I would rather choose from modest unimpressive academic fields than for the Foundation, projects those that stand out in gaudy, gorgeous popular acclaim. Front Matter....Pages I-XIV Front Matter....Pages 1-1 Spin Fluctuations and a Unified Picture of Magnetism....Pages 2-28 Calculation of the Magnetic Properties of Iron and Nickel by the Functional Integral Method....Pages 29-37 A Spin Fluctuation Theory of Itinerant-Electron Systems — The Single-Site Approximation....Pages 38-50 Comments on Weakly and Nearly Ferromagnetic Metals....Pages 51-54 Ferromagnetism in Iron and Nickel....Pages 55-62 Short-Range Magnetic Order in Iron and Nickel....Pages 63-65 Effective Spin Fluctuation Energies: How Should They Be Calculated? What Do They Mean?....Pages 66-68 Functional Integral Representations in Spin Fluctuation Theory: Is There a Right One?....Pages 69-72 The Magnetism of bcc Iron....Pages 73-83 Thermal Expansion Due to Magneto-Volume Effect in Ferromagnetic Metals....Pages 84-90 Functional Integral Approach to the Low-Temperature Properties of Itinerant Ferromagnets....Pages 91-100 Front Matter....Pages 101-101 The Screening of Excess d Holes by s and p Electrons in Nickel....Pages 102-108 The Ground State of fcc Nickel-Base Ferromagnetic Disordered Alloys....Pages 109-114 Many-Body Effect on the Ferromagnetism in Transition Metals....Pages 115-125 Electronic Band Structure and Helical Spin Density Wave of MnSi....Pages 126-135 Front Matter....Pages 137-137 Stoner and Kondo Spin Glasses....Pages 138-149 Itinerant Magnetism Approach for Understanding One-Dimensional Antiferromagnets....Pages 150-162 Magnetic Susceptibility of the Strongly Correlated Hubbard Model....Pages 163-171 Electron Correlation in the Small Hubbard Model....Pages 172-176 Front Matter....Pages 177-177 Dynamics of 4 f Electrons in Mixed Valence Compounds....Pages 178-195 Front Matter....Pages 177-177 Effect of Strong Correlation on a Mixed Valence System....Pages 196-209 Ground State of the Periodic Anderson Hamiltonian....Pages 210-229 f Bands in Lanthanium Compounds....Pages 230-236 Valence Fluctuating States in Ce Compounds: Survey of Our Group Work....Pages 237-255 Back Matter....Pages 257-260